FprEN 1423

SLOVENSKI STANDARD
01-februar-2009
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Road marking materials - Drops on materials - Glass beads, antiskid aggregates and
mixtures of the two
Straßenmarkierungsmaterialien - Nachstreumittel - Glasperlen, Griffigkeitsmittel,
Nachstreugemische
Produits de marquage routier - Produits de saupoudrage - Microbilles de verre, granulats
antidérapants et mélange de ces deux composants
Ta slovenski standard je istoveten z: prEN 1423
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
prEN 1423
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2008
ICS 93.080.20 Will supersede EN 1423:1997
English Version
Road marking materials - Drops on materials - Glass beads,
antiskid aggregates and mixtures of the two
Produits de marquage routier - Produits de saupoudrage - Straßenmarkierungsmaterialien - Nachstreumittel -
Microbilles de verre, granulats antidérapants et mélange de Markierungs-Glasperlen, Griffigkeitsmittel,
ces deux composants Nachstreugemische
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 226.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
: This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
Warning
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1423:2008: E
worldwide for CEN national Members.

prEN 1423:2008 (E)
Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Definitions .5
4 Requirements for glass beads .5
5 Requirements for antiskid aggregates .8
6 Mixture of glass beads and antiskid aggregates.9
7 Sampling.10
8 Evaluation of conformity.10
9 Marking .13
Annex A ( normative )  Test method to determine the refractive index of the glass beads.14
Annex B (normative)  Test methods to determine the resistance of the glass beads to the effects of
water, hydrochloric acid, calcium chloride and sodium ulphide.17
Annex C (normative)  Glass bead imperfections.19
Annex D (normative)  Test method to determine the quality of the glass beads.23
Annex E (normative)  Test method to determine the presence of the moisture proof coating.25
Annex F (normative) Test method to determine the presence of floatation coating.27
Annex G (normative)  Test method to determine the friability index of the antiskid aggregates .28
Annex H (informative) Alternative test methods to determine the percentage of defective of glass
beads.31
H.2.2 Procedure .31
H.2.3 Results of counting .32
Annex I (normative) Test Method to determine the presence of dangerous substances. .38
Annex J (Normative) Test method to determine glass beads and aggregates ratio in mixture.39
Annex ZA (Informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive.40
Bibliography .49

prEN 1423:2008 (E)
Foreword
This document (prEN 1423:2008) has been prepared by Technical Committee CEN/TC 226 “Road equipment”, the
secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1423:1997.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this document.

prEN 1423:2008 (E)
1 Scope
This European Standard specifies the requirements for laboratory tests (production control) and qualification
procedures for the following drop on materials used in road markings.

These materials are dropped on to paints, thermoplastics, cold plastics and any other marking product applied in a
liquid state, immediately after application to the road surface.

The requirements taken into consideration in this standard are:

- glass bead : raw material nature, chemical composition, granulometry, refractive index of the glass, chemical
resistance, quality, surface treatment ;

- antiskid aggregate : chemical characteristics, friability, colour, granulometry ;

- mixture of glass beads and antiskid aggregates : the requirements for both components.

2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies.

IS0 565, Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings
IS0 787-9, General methods of test for pigments and extenders -
Part 9: Determination of pH value of an aqueous suspension
IS0 2591-1, Test sieving - Part 1: Methods using test sieves of woven wire cloth and perforated metal plate
ISO 3310-1, Test sieves: Technical requirements and check
EN ISO 5725, Precision of test methods – Determination of repeatability and reproducibility for a standard test
method by inter-laboratory test
IS0 7724-2 , Paints and varnishes - Colorimetry - Part 2: Colour measurement
ISO/CIE 10526, CIE Standard colorimetric illuminants
EN 12802, Road marking materials – Laboratory methods for identification
EN 13212, Road marking materials – Requirements for the factory production control
prEN 1423:2008 (E)
3 Definitions
For the purpose of this product standard, the following definitions apply:

3.1
types of drop-on materials
3.1.1
glass bead
transparent spherical glass particle, used to provide night visibility for the road markings by retroreflecting the
incident headlight beams of a vehicle towards the driver.
This product is defined by four characteristics: refractive index, quality, granulometry, resistance to chemicals. In
addition, surface treatment with its intended use shall be declared by manufacturer (if any).

3.1.2
antiskid aggregate
hard grain of natural or artificial origin, used to provide antiskid qualities for the road markings.
This product is defined by two characteristics: granulometry, friability index. For non-transparent antiskid aggregate
only, third characteristic is color co-ordinates and luminance factor.

3.1.3
mixture of glass beads and antiskid aggregates
this product is a combination of here above product criterias and their relative ratio.

3.2
intermediate bulk container (IBC)
container with a capacity of up to 1300 kg, used as an intermediate solution in between bags and tins (25 kg to 50
kg) and bulk transport.
4 Requirements for glass beads
4.1 Dangerous substances
In order to check the content of arsenic, lead and antimony, the glass beads shall be tested in accordance with
annex I
Each element (As, Pb, Sb) shall be separately classified into one of the three following classes:

- Class 0: NPD
- Class 1: ≤ 1000 ppm
- Class 2: ≤ 200 ppm
4.2 Granulometry
The granulometry of the glass beads shall be described giving the minimum and the maximum percentages by
mass of the cumulative retained glass beads on metal wire cloth test sieves: IS0 565 - Sizes R 40/3 using the test
sieving procedure defined in IS0 2591-1.
Granulometries shall be described by selecting sieves in accordance with the following rules (also see table 1):

- the upper safety sieve shall retain less than 0 % to 2 % of the total mass of the glass beads ;
- the upper nominal sieve shall retain 2% to 10 % of the beads ;
- if necessary, intermediate sieves shall be added to limit the ratio between the nominal sizes of openings of
two successive sieves to a maximum of 1,7 : 1 ;
prEN 1423:2008 (E)
- for each of the intermediate sieves, the range by mass between the minimum N % and the maximum N %
1 2
of the cumulative retained percentages shall be not more than 40 % (N - N ≤ 40) ;
2 1
- the lower nominal sieve shall retain 95 % to 100 % of the beads.

Table 1 - Selecting sieves for glass beads

Sieves IS0 565 R 40/3 Cumulative retained mass

%
upper safety 0 to 2
upper nominal 0 to 10
intermediate N to N
1 2
lower nominal 95 to 100
Examples of the interpretation of the rules to specify the granulometry of glass beads are given in table 2 and
Table 3.
Table 2 - Example 1: 425-90 microns
Sieves IS0 565 R 40/3 Cumulative retained mass
µm %
500 0 to 2
425 0 to 10
250 20 to 60
150 60 to 95
90 95 to 100
Table 3 - Example 2: 600-125 microns
Sieves IS0 565 R 40/3 Cumulative retained mass
µm %
710 0 to 2
600 0 to 10
355 30 to 70
212 70 to 100
125 95 to 100
The reference method to determine the granulometry of the glass beads is IS0 2591-1

4.3 Refractive index
The refractive index n of the glass beads, shall be determined in accordance with annex A. It shall conform to the
following classes:
Class A : n ≥ 1,5;
Class B : n ≥ 1,7;
Class C : n ≥ 1,9.
4.4 Resistance to chemicals : water, hydrochloric acid, calcium chloride and sodium sulphide
The resistance shall be determined in accordance with annex B and glass beads shall not develop any surface
haze or dulling when in contact with any of the following: water, hydrochloric acid, calcium chloride and sodium
sulfide.
prEN 1423:2008 (E)
4.5 Quality requirements
The reference method of testing quality is described in annex D; glass beads with imperfections as described in
annex C shall be considered defective.
Quality of glass beads = 100% minus total weighted percentage of defective glass beads.

Applying the reference method and taking into consideration only one defect per bead, the maximum weighted
percentage of defective beads shall be 20 % including a maximum of 3 % of grains and foreign particles (see table 4).
If a granulometry includes beads with diameters lower than 1 mm and diameters equal to or greater than 1 mm they
shall be separated by means of a sieve with nominal sizes of openings of 1 mm and checked separately.

Table 4 - Maximum weighted percentage of defective glass beads
Diameter of glass beads Maximum weighted Maximum weighted
mm percentage of defective percentage of grains and

glass beads foreign partic
...